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Positive effect of fluorescent brightener-28 and neemazal T/S on the activity of Agrotis segetum granulovirus tested against Agrotis ipsilon (Hufn.) larvae (Lepidoptera: Noctuidae) [electronic resource].

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Khattab, Magda M

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Language: English Summary language: Arabic Description: p.119-126Other title:

تأثير إيجابي لمركبات العواكس الفلوروسنتية و النيم علي نشاط فيروس جرانيولو دودة اللفت القارضة (AgseGV) ضد يرقات حشرة الدودة القارضة السوداء [Added title page title]

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Egyptian journal of biological pest control, 2004 v. 14 (1), Special issue [electronic resource]:

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In: Egyptian journal of biological pest control. : Proceeding of 1st Arab Conference for Applied Biological Pest Control, Cairo, Egypt, 5-7 April 2004 2004.v.14(1)SISummary: Fluorescent brightener-28 and Neemazal T/S (Neem) were used at different concentrations to increase the efficacy of Ag,veGV tested against Agrotis psi/on (Hufn.) neonate larvae. F, brightener tested alone, did not result in any larval mortality whereas, the rate of larval mortality due to virus was increased with increasing concentrations ofF. brightener additive, in comparison with virus alone treatment. The rate of enhancement of virus activity reached 1096.678 fold at 0.1% concentration. The calculated LT50 value decreased from 11.47 to 4.66 days at the concentration of 3.85x107 capsule/ml diet when combined with 0.1% F. brightener. Neemazal T/S was added at three different concentrations (1,5 and 10, ppm) to AgseGV suspension and tested against A. ip,vilOn neonate larvae. Obtained results demonstrated that the Neem oil poorly enhanced the activity of AgseGV by reducing the LC50 value from 3.59x107 capsule/m1 diet for the virus alone treatment to only 7.11x106 capsule/ m1 diet for the virus + Neem (at 10 ppm) treatment (potency = 5.057 fold). The calculated LT50 value decreased from14.13 days for the virus alone treatment to 13.14, 10.56 and 7.2 days for the tested Neemazal concentrations, respectively. In conclusion, the combination of F. brightener or Neemazal T/S with the baculovirus, AgseGV may improve the activity of virus formulations. Key Words: Agrotis ipsilon, baculovirus, cutworm, fluorescent brightener 28, granulovirus, Neemazal, synergism.

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Fluorescent brightener-28 and Neemazal T/S (Neem) were used at different concentrations to increase the efficacy of Ag,veGV tested against Agrotis psi/on (Hufn.) neonate larvae. F, brightener tested alone, did not result in any larval mortality whereas, the rate of larval mortality due to virus was increased with increasing concentrations ofF. brightener additive, in comparison with virus alone treatment. The rate of enhancement of virus activity reached 1096.678 fold at 0.1% concentration. The calculated LT50 value decreased from 11.47 to 4.66 days at the concentration of 3.85x107 capsule/ml diet when combined with 0.1% F. brightener. Neemazal T/S was added at three different concentrations (1,5 and 10, ppm) to AgseGV suspension and tested against A. ip,vilOn neonate larvae. Obtained results demonstrated that the Neem oil poorly enhanced the activity of AgseGV by reducing the LC50 value from 3.59x107 capsule/m1 diet for the virus alone treatment to only 7.11x106 capsule/ m1 diet for the virus + Neem (at 10 ppm) treatment (potency = 5.057 fold). The calculated LT50 value decreased from14.13 days for the virus alone treatment to 13.14, 10.56 and 7.2 days for the tested Neemazal concentrations, respectively. In conclusion, the combination of F. brightener or Neemazal T/S with the baculovirus, AgseGV may improve the activity of virus formulations. Key Words: Agrotis ipsilon, baculovirus, cutworm, fluorescent brightener 28, granulovirus, Neemazal, synergism.

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